1: Login
2: Open up a thread
3: Wait until login will have timed out
4: Without clicking refresh or nothin', type a long meticulous treatise on mastering Japanese and the meaning of the cosmos in the quick reply field from step 2.
5: Click to post.
6: Watch post disappear into the aether.

Last edited by Gundaetiapo on Mon 05.21.2007 11:27 pm, edited 1 time in total.

There's not much that can be done about that I'm afraid.
Session time out default is usually set to one hour (I don't know about this site in particular).
It could be set to more but that puts more strain on the server's memory for having to remember more sessions than it really needs to.

I'd recommend clicking any link at least once an hour or make sure you're still logged in before you start typing something.